lucene-查询query->FuzzyQuery相近词语的搜索

FuzzyQuery是一种模糊查询，它可以简单地识别两个相近的词语。下面以11.10为例进行详细介绍。

package ch11;

import org.apache.lucene.analysis.standard.StandardAnalyzer;

import org.apache.lucene.document.Document;

import org.apache.lucene.document.Field;

import org.apache.lucene.index.IndexWriter;

import org.apache.lucene.index.Term;

import org.apache.lucene.search.FuzzyQuery;

import org.apache.lucene.search.Hits;

import org.apache.lucene.search.IndexSearcher;

public class FuzzyQueryTest {

public static void main(String[] args) throws Exception {

//生成Document对象

Document doc1 = new Document();

//添加“content”字段的内容

doc1.add(Field.Text("content", "david"));

//添加“title”字段的内容

doc1.add(Field.Keyword("title", "doc1"));

Document doc2 = new Document();

doc2.add(Field.Text("content", "sdavid"));

doc2.add(Field.Keyword("title", "doc2"));

Document doc3 = new Document();

doc3.add(Field.Text("content", "davie"));

doc3.add(Field.Keyword("title", "doc3"));

//生成索引书写器

IndexWriter writer = new IndexWriter("c://index",

new StandardAnalyzer(), true);

//将文档添加到索引中

writer.addDocument(doc1);

writer.addDocument(doc2);

writer.addDocument(doc3);

//关闭索引写器

writer.close();

//生成索引搜索器

IndexSearcher searcher = new IndexSearcher("c://index");

Term word1 = new Term("content", "david");

//用于保存检索结果

Hits hits = null;

//生成FuzzyQuery对象，初始化为null

FuzzyQuery query = null;

query = new FuzzyQuery(word1);

//开始检索，并返回检索结果

hits = searcher.search(query);

//输出检索结果的相关信息

printResult(hits,"与'david'相似的词");

}

public static void printResult(Hits hits, String key) throws Exception

{System.out.println("查找 /"" + key + "/" :");

if (hits != null) {

if (hits.length() == 0) {

System.out.println("没有找到任何结果");

System.out.println();

} else {

System.out.print("找到");

for (int i = 0; i < hits.length(); i++) {

//取得文档对象

Document d = hits.doc(i);

//取得“title”字段的内容

String dname = d.get("title");

System.out.print(dname + "   ");

}

System.out.println();

System.out.println();

}

}

}

}

在上述代码中，首先构建了3个Document，这3个Document的“content”字段中都有一个与“david”较为相似的关键字（其中第一个就是david）。然后使用FuzzyQuery来对其进行检索。